Deutsche Bahn AG (also known as DB, DB AG or DBAG) is a German railway company. It is headquartered in Berlin. The railway enterprise is a private joint-stock company (AG), with the Federal Republic of Germany being its sole shareholder. Deutsche Bahn describes itself as the 2nd-biggest transport company in the world, next to the German logistics and postal company Deutsche Post / DHL, and is the biggest railway infrastructure owner and operator in Europe. It carries about 2 billion passengers annually.